I found a couple of small imperfections in the tzdata files. asia file: Cyprus is now (May 01, 2004) part of the European Union. In spite of the interesting remarks for Cyprus in the tz data file, the Cyprus entry should be in the europe file. antarctica file: New Zealand: Rules are given, but no Zone information, so no actual time information. All files: GMT is obsolete. UTC should be used. Nearly all files, lots of entries: In some cases DST is no longer observed, but the Zone lines still mention a DST Rule. One example from the asia file (some information omitted by me): # Korea (North and South) ... # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule ROK 1960 only - May 15 0:00 1:00 D Rule ROK 1960 only - Sep 13 0:00 0 S Rule ROK 1987 1988 - May Sun<=14 0:00 1:00 D Rule ROK 1987 1988 - Oct Sun<=14 0:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Seoul 8:27:52 - LMT 1890 8:30 - KST 1904 Dec 9:00 - KST 1928 8:30 - KST 1932 9:00 - KST 1954 Mar 21 8:00 ROK K%sT 1961 Aug 10 8:30 - KST 1968 Oct 9:00 ROK K%sT ... Since South Korea no longer observes DST, it would be better for the consistency of the database if the last line was changed into: 9:00 ROK K%sT 1988 Oct and an extra line was added, like: 9:00 - KST The software will give the correct time for e.g. this moment I guess, because no Rule line can be found, valid for May 2004. So, changing the database files for this could get a low priority, but it is still an imperfection! Oscar van Vlijmen 2004-05-17